Piston ring



A. F. FROUSSARD.

PISTON RING.

APPLICATION mm MAYI. ma.

1,1416,01 1. Pafi n ed y16, 19.22.

0 Fig.l. 10

A.E Fmussarol ATTEIRNEY INVENTUR nrnr PISTON RING.

Specification of Letters Patent.

Applcaton fi1ed May 1, 1919. Serial No. 294,035.

To aZZ-w/wm it may concem: V

B it known that I, ALBERI F. FROUSSARD, a citizen of the United States of America, residing at the city of St. Louis, State of Missouri United States of America, hzwe invented certain new and useful Piston Rings, of which the following is such a full, clear, end exact description as Will enable any one skilled in tbe art ho which it appertains to make and use the same, reference being had to the accompanying dravvings, forming part of this specification.

My invention relates to a piston ring or packing end particularly to aring consisting of an annular base member provided with a channel in its periphery end a 'fiiler in seid channel having its face flush with the-face of the base member.

In the accompanying drawings, which illustrate one form of piston ring made in accordnnce with my invention together with a, piston to which the same is applied, end a cylinder containing thepiston, Figure 1 is a longitudinal section through the cylinder, the piston end rings being shown partly in scction end partly in elevation, Figure 2 is a, side view of che ring, Figure 3 is an enlarged section taken on the line 8--8 of Figure 2, Figure 4 is an e111arged VieW of.n part ofthe ring looking from the inner side, end Figure 5 is an enlarged view of part of the periphery of the ring.

6 indicates a piston to which the rings are epplied and 7 the cylinder containing the piston. The piston 6 is provided with two grooves 8 in the usual manner, each adapted to receive a piston ring or packing. Each packing consists of a base member 9 provided in its periphery with a chennel of semicircular cross section, end a filler 10 situated in said channel With its fece flush with the face of the member. The Inember 9 consists of a split ring the ends of which are out away to leave overlapp ing parts 11. In

rings of three or four inches in diameter, I find one fourth of an inch to be about the Patenfeei iMay re, 1922.

proper length for these overlapping ends.

When the ring is not under compression the ends should be about in alinement as shown in Figure 4: of the drawings. But when the ring is under compression as shown in Figure 1 the end pieces 11 should overlap throughout nearly their entire length. The filler 10 consists of (L split ring end hasits ends cut away to form overlapping parts 12 sim iier to che parts 11 but formed in reverse pos1tion to said partsso that the cuts in the )WO rings cannot be brought into alinement in any relative positions of the two rings.

I find thai; by providing the face member with a cbannel of semicircular cross section, the ring can be made much strongerthan with a channel of angular cross section and that the two parts of the ring can be more readily assembled.

Having fully described rny invention, what I clairn es new and desire to secure by Letters Patent of the United Statesis:

1. A piston ring of substantially rectangular shepe in cross section end having a channel in the cylinder beering fece of said ring, said channel hming a curved face, and a spring 1nember having a face to correspond with end fit Within said channel, end un outer face to normally align with the cylinder engaging fece of the ring.

2. A piston ring of substantially reccangulai shape in cross section end having a channel of substentially semi-circuiar shape in the cylinder bearing fece of such ring, and a spring member having a face to correspond wich end fit' within said channel, and an outer face to n0rmally align with the cylinder engaging fece of the ring.

In testimony whereof, I have hereunto set my hand end affixed my seal.

ALBERT F. FROUSSARD. [L.S.j 

